<style>
.aspect-ratio {
    position: relative;
    width: 100%;
    height: 0;
    padding-bottom: 75%;
    }
        
.aspect-ratio iframe {
    position: absolute;
    width: 100%;
    height: 100%;
    left: 0;
    top: 0;
    }
</style>
        

<div align=center class="aspect-ratio">
    <iframe src="https://player.bilibili.com/player.html?aid={{ index .Params 0 }}&&page=1&as_wide=1&high_quality=1&danmaku=0" 
    scrolling="no" 
    border="0" 
    frameborder="no" 
    framespacing="0" 
    allowfullscreen="true"> 
    </iframe>
</div>
    